WO2005091905A3 - Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals - Google Patents

Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals Download PDF

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Publication number
WO2005091905A3
WO2005091905A3 PCT/US2005/006528 US2005006528W WO2005091905A3 WO 2005091905 A3 WO2005091905 A3 WO 2005091905A3 US 2005006528 W US2005006528 W US 2005006528W WO 2005091905 A3 WO2005091905 A3 WO 2005091905A3
Authority
WO
WIPO (PCT)
Prior art keywords
wireless node
location
signals
infrastructure
node location
Prior art date
Application number
PCT/US2005/006528
Other languages
French (fr)
Other versions
WO2005091905A2 (en
Inventor
Gregg Scott Davi
Paul F Dietrich
Alexander H Hills
Original Assignee
Airespace Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Airespace Inc filed Critical Airespace Inc
Priority to DE202005021141U priority Critical patent/DE202005021141U1/en
Priority to CA002558442A priority patent/CA2558442A1/en
Priority to EP05724135.8A priority patent/EP1733247B1/en
Publication of WO2005091905A2 publication Critical patent/WO2005091905A2/en
Publication of WO2005091905A3 publication Critical patent/WO2005091905A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G01S5/0226—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0252—Radio frequency fingerprinting
    • G01S5/02521—Radio frequency fingerprinting using a radio-map
    • G01S5/02524—Creating or updating the radio-map
    • G01S5/02527—Detecting or resolving anomalies in the radio frequency fingerprints of the radio-map
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location

Abstract

A wireless node location mechanism that dynamically adapts to changes to a surrounding physical environment that affect the propagation of radio signals. The wireless node location mechanism assesses radio signals from transmitters associated with a wireless node location infrastructure to adjust one or more parameters used to estimate location of a wireless node. In one implementation, path loss exponents are re-computed based on the signals transmitted between infrastructure radio transceivers. These path loss exponents are used, in one implementation, to compute the distance between a wireless node and a given infrastructure radio transceiver and, ultimately, to determine the location of the wireless node based on triangulation. In one implementation, path loss exponents are computed on demand based on the signals observed between infrastructure radios that detect the wireless node whose location is to be estimated.
PCT/US2005/006528 2004-03-05 2005-02-28 Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals WO2005091905A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE202005021141U DE202005021141U1 (en) 2004-03-05 2005-02-28 Wireless Node Localization Mechanism that responds to observed propagation characteristics of signals in wireless network infrastructures.
CA002558442A CA2558442A1 (en) 2004-03-05 2005-02-28 Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals
EP05724135.8A EP1733247B1 (en) 2004-03-05 2005-02-28 Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/794,842 US7205938B2 (en) 2004-03-05 2004-03-05 Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals
US10/794,842 2004-03-05

Publications (2)

Publication Number Publication Date
WO2005091905A2 WO2005091905A2 (en) 2005-10-06
WO2005091905A3 true WO2005091905A3 (en) 2006-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/006528 WO2005091905A2 (en) 2004-03-05 2005-02-28 Wireless node location mechanism responsive to observed propagation characteristics of wireless network infrastructure signals

Country Status (5)

Country Link
US (1) US7205938B2 (en)
EP (1) EP1733247B1 (en)
CA (1) CA2558442A1 (en)
DE (1) DE202005021141U1 (en)
WO (1) WO2005091905A2 (en)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7293088B2 (en) 2003-07-28 2007-11-06 Cisco Technology, Inc. Tag location, client location, and coverage hole location in a wireless network
US7613720B2 (en) * 2004-12-07 2009-11-03 International Business Machines Corporation Selectively removing entities from a user interface displaying network entities
JP4607905B2 (en) * 2004-12-28 2011-01-05 富士通株式会社 Tag extraction device, tag extraction method, and tag extraction program
US7428747B2 (en) * 2005-01-25 2008-09-23 Sony Corporation Secure channel reservation
US20060238419A1 (en) * 2005-04-25 2006-10-26 Bucknor Brian E Method and apparatus for aiding positioning of a satellite positioning system and receiver
US7548517B2 (en) * 2005-04-25 2009-06-16 Motorola, Inc. Method and apparatus for determining the location of a node in a wireless system
US7805111B1 (en) * 2005-05-03 2010-09-28 Lockheed Martin Corporation Fast log-radial wireless terrain propagation prediction method
US7436781B2 (en) * 2005-06-02 2008-10-14 Motorola, Inc. Method and apparatus for determining the location of a node in a wireless system
US7742456B2 (en) * 2005-11-04 2010-06-22 Symbol Technologies, Inc. System and method for locationing in a communications network
US7760681B1 (en) 2005-11-21 2010-07-20 Marvell International Ltd. Transmit power adaptation algorithm using 802.11H
US7672282B1 (en) 2005-11-21 2010-03-02 Marvell International Ltd. BSS selection using path loss
US20070132577A1 (en) * 2005-12-09 2007-06-14 Honeywell International Inc. Method and apparatus for estimating the location of a signal transmitter
US20070142061A1 (en) * 2005-12-20 2007-06-21 Taubenheim David B Method and apparatus for determining the location of a node in a wireless network
US7590418B1 (en) 2006-01-20 2009-09-15 Cisco Technology, Inc. Method and apparatus of a location server for hierarchical WLAN systems
US20070296633A1 (en) * 2006-04-11 2007-12-27 Oki Electric Industry Co., Ltd. System and method for position estimation with high accuracy and a wireless communication terminal device therefor
US7880676B2 (en) * 2006-04-19 2011-02-01 Wichorus Inc. Method and system for hybrid positioning using partial distance information
EP1865335A1 (en) * 2006-06-07 2007-12-12 Siemens Aktiengesellschaft Hybrid localisation in a radio communication system
US7683835B2 (en) * 2006-08-15 2010-03-23 Computer Associates Think, Inc. System and method for locating wireless devices
US7787891B2 (en) * 2006-12-20 2010-08-31 Intel Corporation Mobile station localization apparatus, systems, and methods
US20080161011A1 (en) * 2006-12-29 2008-07-03 Motorola, Inc. Method enabling indoor local positioning and movement tracking in wifi capable mobile terminals
US8838831B2 (en) * 2007-05-01 2014-09-16 Cisco Technology, Inc. Populating location wiremap databases
US8483719B2 (en) * 2007-06-01 2013-07-09 Qualcomm Incorporated Methods and apparatus for determining FEMTO base station location
US20080299994A1 (en) * 2007-06-01 2008-12-04 Motorola, Inc. System and Method for Location Determination for Mobile Clients
KR100897195B1 (en) 2007-06-25 2009-05-14 한국전자통신연구원 System and method for localization
US8989764B2 (en) * 2007-09-05 2015-03-24 The University Of Utah Research Foundation Robust location distinction using temporal link signatures
US7830250B2 (en) * 2007-10-22 2010-11-09 Honeywell International Inc. Apparatus and method for location estimation using power supply voltage levels of signal transmitters
KR100939354B1 (en) * 2007-11-28 2010-01-29 한국전자통신연구원 Method for determining location using the access point and device thereof
US7852205B2 (en) * 2008-04-10 2010-12-14 Honeywell International Inc. System and method for calibration of radio frequency location sensors
US8503673B2 (en) 2008-09-11 2013-08-06 University Of Utah Research Foundation Method and system for secret key exchange using wireless link characteristics and random device movement
US8515061B2 (en) * 2008-09-11 2013-08-20 The University Of Utah Research Foundation Method and system for high rate uncorrelated shared secret bit extraction from wireless link characteristics
WO2010030956A2 (en) * 2008-09-12 2010-03-18 University Of Utah Research Foundation Method and system for tracking objects using radio tomographic imaging
US8165150B2 (en) * 2008-12-17 2012-04-24 Avaya Inc. Method and system for wireless LAN-based indoor position location
US20130121205A1 (en) * 2009-01-26 2013-05-16 Floyd Backes Method for Selecting an Optimum Access Point in a Wireless Network on a Common Channel
US8311558B2 (en) * 2009-03-20 2012-11-13 Buzby Networks, Llc Real-time network node location system and method
US8073438B2 (en) * 2009-06-03 2011-12-06 Mcnally Christopher Method and system for disabling a wireless communication device
US8880103B2 (en) 2009-10-12 2014-11-04 Qualcomm Incorporated Method and apparatus for transmitting indoor context information
US20110102267A1 (en) * 2009-10-30 2011-05-05 Janiszewski Tom J Method and system for determining location information
US8818288B2 (en) 2010-07-09 2014-08-26 University Of Utah Research Foundation Statistical inversion method and system for device-free localization in RF sensor networks
KR101144486B1 (en) * 2010-09-30 2012-05-11 인하대학교 산학협력단 Distance estimation method based on sequential rearrangement of received signal strength in wireless sensor networks
TWI442078B (en) * 2011-02-25 2014-06-21 Inst Information Industry Positioning apparatus, positioning method and computer program product thereof
US20130010617A1 (en) * 2011-07-07 2013-01-10 Qualcomm Atherons, Inc. Relative position determination of wireless network devices
KR101260647B1 (en) * 2011-08-19 2013-05-06 서울대학교산학협력단 Wireless localization method based on an efficient multilateration algorithm over a wireless sensor network and a recording medium in which a program for the method is recorded
WO2014056183A1 (en) * 2012-10-12 2014-04-17 Intel Corporation Location estimation based on adjusted distance values for a wireless device
KR101691905B1 (en) 2013-03-19 2017-01-02 인텔 코포레이션 Building floor determination for a location based service
US9134124B2 (en) * 2014-02-11 2015-09-15 Caterpillar Inc. System and method for estimation of machine position
US9699757B2 (en) * 2014-04-15 2017-07-04 Verizon Patent And Licensing Inc. Small cell assisted location identification for a user device
US9538457B2 (en) * 2014-07-14 2017-01-03 Time Warner Cable Enterprises Llc Wireless spectrum usage and control of access point probe responses
WO2016093860A1 (en) * 2014-12-12 2016-06-16 Ruckus Wireless, Inc. Calibration-free location determination using wireless communication
CA3001490C (en) * 2015-11-09 2024-03-19 Wiser Systems, Inc. Methods for synchronizing multiple devices and determining location based on the synchronized devices
US10455350B2 (en) 2016-07-10 2019-10-22 ZaiNar, Inc. Method and system for radiolocation asset tracking via a mesh network
US10206193B2 (en) 2016-08-31 2019-02-12 At&T Intellectual Property, L.P. Mobile device location based on detection of radiation sources
US10262479B2 (en) * 2017-02-24 2019-04-16 Huf North America Automotive Parts Mfg. Corp. System and method for communicating with a vehicle
EP3596960A4 (en) 2017-03-17 2021-01-20 Michael Wang Precise positioning system and method of using the same
US11609300B2 (en) * 2017-03-17 2023-03-21 SIRL, Inc. Precise positioning system enabled product location method
EP3668197B1 (en) * 2018-12-12 2021-11-03 Rohde & Schwarz GmbH & Co. KG Method and radio for setting the transmission power of a radio transmission
US11327147B2 (en) 2018-12-26 2022-05-10 Locix, Inc. Systems and methods for determining locations of wireless sensor nodes based on anchorless nodes and known environment information
CN114258056A (en) * 2021-12-08 2022-03-29 中国南方电网有限责任公司 Node positioning simulation system, method and device based on OPNET network

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570412A (en) * 1994-09-28 1996-10-29 U.S. West Technologies, Inc. System and method for updating a location databank
US5717406A (en) * 1995-06-07 1998-02-10 Sanconix Inc. Enhanced position calculation
US6674403B2 (en) * 2001-09-05 2004-01-06 Newbury Networks, Inc. Position detection and location tracking in a wireless network
US6799047B1 (en) * 1999-02-25 2004-09-28 Microsoft Corporation Locating and tracking a user in a wireless network through environmentally profiled data
US6990428B1 (en) * 2003-07-28 2006-01-24 Cisco Technology, Inc. Radiolocation using path loss data

Family Cites Families (96)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254467A (en) 1979-06-04 1981-03-03 Xerox Corporation Vector to raster processor
US5063371A (en) 1986-09-29 1991-11-05 Oyer Michael W Aircraft security system
US5028848A (en) 1988-06-27 1991-07-02 Hewlett-Packard Company Tile vector to raster conversion method
JPH0693650B2 (en) 1988-08-05 1994-11-16 日本電信電話株式会社 Moving body position detection method
GB9016277D0 (en) 1990-07-25 1990-09-12 British Telecomm Location and handover in mobile radio systems
US5396582A (en) 1991-02-06 1995-03-07 Hewlett-Packard Company Raster to vector conversion system and method therefor
IT1264320B (en) 1992-12-01 1996-09-23 SYSTEM FOR AUTOMATICALLY DISTRIBUTING CALLS TO RADIOTAXI
US5327144A (en) 1993-05-07 1994-07-05 Associated Rt, Inc. Cellular telephone location system
SE500769C2 (en) 1993-06-21 1994-08-29 Televerket Procedure for locating mobile stations in digital telecommunications networks
JP2833967B2 (en) 1993-07-23 1998-12-09 日本電気株式会社 Cell phone position detection method
US5761328A (en) 1995-05-22 1998-06-02 Solberg Creations, Inc. Computer automated system and method for converting source-documents bearing alphanumeric text relating to survey measurements
US5732354A (en) 1995-06-07 1998-03-24 At&T Wireless Services, Inc. Method and apparatus for determining the location of a mobile telephone
KR100303633B1 (en) 1996-03-05 2001-09-24 가부시키가이샤 로가스 System for detecting positional information
GB2311697B (en) 1996-03-22 1999-07-28 Matsushita Electric Ind Co Ltd Wireless communication system and method and system for detection of position of radio mobile station
US6249252B1 (en) 1996-09-09 2001-06-19 Tracbeam Llc Wireless location using multiple location estimators
US6236365B1 (en) 1996-09-09 2001-05-22 Tracbeam, Llc Location of a mobile station using a plurality of commercial wireless infrastructures
US6112095A (en) 1997-01-08 2000-08-29 Us Wireless Corporation Signature matching for location determination in wireless communication systems
EP0967816A4 (en) 1997-03-11 2000-06-14 Locus Corp Field intensity distribution generator
US6167274A (en) 1997-06-03 2000-12-26 At&T Wireless Svcs. Inc. Method for locating a mobile station
CA2301159A1 (en) 1997-08-20 1999-02-25 Locus Corporation Location system and mobile communication device
US6115605A (en) 1997-08-29 2000-09-05 Ppm, Inc. Communication system and device using dynamic receiver addressing
DE19751487A1 (en) * 1997-11-20 1999-06-02 Pac Tech Gmbh Method and device for the thermal connection of pads of two substrates
US6212391B1 (en) 1997-12-01 2001-04-03 Motorola, Inc. Method for positioning gsm mobile station
US6414634B1 (en) 1997-12-04 2002-07-02 Lucent Technologies Inc. Detecting the geographical location of wireless units
JPH11205845A (en) 1998-01-14 1999-07-30 Locus:Kk Position specifying system
US6804394B1 (en) 1998-04-10 2004-10-12 Hsu Shin-Yi System for capturing and using expert's knowledge for image processing
US6625135B1 (en) * 1998-05-11 2003-09-23 Cargenie Mellon University Method and apparatus for incorporating environmental information for mobile communications
US6226400B1 (en) 1998-06-24 2001-05-01 Colorcom, Ltd. Defining color borders in a raster image by identifying and breaking contrast ties
US6456892B1 (en) 1998-07-01 2002-09-24 Sony Electronics, Inc. Data driven interaction for networked control of a DDI target device over a home entertainment network
US6243811B1 (en) 1998-07-31 2001-06-05 Lucent Technologies Inc. Method for updating secret shared data in a wireless communication system
US6650896B1 (en) 1998-08-13 2003-11-18 International Business Machines Corporation Error correlation for wireless networks
US6441777B1 (en) 1998-08-26 2002-08-27 Mcdonald Keith D. Signal structure and processing technique for providing highly precise position, velocity, time and attitude information with particular application to navigation satellite systems including GPS
US6269246B1 (en) 1998-09-22 2001-07-31 Ppm, Inc. Location determination using RF fingerprinting
US6272541B1 (en) 1998-10-08 2001-08-07 International Business Machines Corporation Data processing system and method for determining a physical location of a client computer system coupled to a server via a physical network
US6198935B1 (en) 1998-11-17 2001-03-06 Ericsson Inc. System and method for time of arrival positioning measurements based upon network characteristics
US6184829B1 (en) 1999-01-08 2001-02-06 Trueposition, Inc. Calibration for wireless location system
KR100403748B1 (en) 1999-01-23 2003-11-03 삼성전자주식회사 Method for tracking a location of mobile telephone in mobile telecommunication network
CA2266998C (en) 1999-03-25 2008-01-15 Canac Inc. Method and apparatus for assigning addresses to components in a control system
US6850946B1 (en) 1999-05-26 2005-02-01 Wireless Valley Communications, Inc. Method and system for a building database manipulator
US6317599B1 (en) 1999-05-26 2001-11-13 Wireless Valley Communications, Inc. Method and system for automated optimization of antenna positioning in 3-D
US6282427B1 (en) 1999-07-14 2001-08-28 Telefonaktiebolaget L M Ericsson (Publ) Selection of location measurement units for determining the position of a mobile communication station
US6700538B1 (en) * 2000-03-29 2004-03-02 Time Domain Corporation System and method for estimating separation distance between impulse radios using impulse signal amplitude
US6766453B1 (en) 2000-04-28 2004-07-20 3Com Corporation Authenticated diffie-hellman key agreement protocol where the communicating parties share a secret key with a third party
US6704352B1 (en) 2000-05-04 2004-03-09 Samsung Electronics Co., Ltd. High accuracy receiver forward and reflected path test injection circuit
US6728782B1 (en) 2000-05-23 2004-04-27 At&T Corp. Method of verifying newly provisioned customer network route advertisements
US6925070B2 (en) 2000-07-31 2005-08-02 Ipr Licensing, Inc. Time-slotted data packets with a preamble
US6556942B1 (en) 2000-09-29 2003-04-29 Ut-Battelle, Llc Short range spread-spectrum radiolocation system and method
KR100364368B1 (en) 2000-10-18 2002-12-12 엘지전자 주식회사 Private Network Using Bluetooth and Communication Method Using the Network
EP1209934A1 (en) 2000-11-27 2002-05-29 Siemens Aktiengesellschaft Method and apparatus to counter the rogue shell threat by means of local key derivation
FI111901B (en) 2000-12-29 2003-09-30 Ekahau Oy Estimation of position in wireless communication networks
US6581000B2 (en) 2001-01-04 2003-06-17 Carnegie Mellon University Position location system and method
US20020102988A1 (en) 2001-01-26 2002-08-01 International Business Machines Corporation Wireless communication system and method for sorting location related information
US7103365B2 (en) 2001-02-21 2006-09-05 International Business Machines Corporation System and method for locating an alternate communication mechanism in case of a failure of a wireless communication device
US7259694B2 (en) 2001-02-26 2007-08-21 International Business Machines Corporation Wireless communication system and method to provide geo-spatial related event data
GB0105910D0 (en) * 2001-03-09 2001-04-25 Cellular Design Services Ltd Measurement-based prediction method for radiation path loss
US7120129B2 (en) 2001-03-13 2006-10-10 Microsoft Corporation System and method for achieving zero-configuration wireless computing and computing device incorporating same
US20020174335A1 (en) 2001-03-30 2002-11-21 Junbiao Zhang IP-based AAA scheme for wireless LAN virtual operators
US7206840B2 (en) 2001-05-11 2007-04-17 Koninklike Philips Electronics N.V. Dynamic frequency selection scheme for IEEE 802.11 WLANs
US7529537B2 (en) 2001-05-14 2009-05-05 International Business Machines Corporation System and method for providing personal and emergency service hailing in wireless network
US6732411B2 (en) 2001-05-23 2004-05-11 Michael A. Vidal Hand tool handle modification system
US20030023746A1 (en) 2001-07-26 2003-01-30 Koninklijke Philips Electronics N.V. Method for reliable and efficient support of congestion control in nack-based protocols
CN1610837A (en) 2001-09-06 2005-04-27 株式会社洛克斯 Method for detecting location of mobile terminal
FI113731B (en) 2001-09-21 2004-05-31 Locus Portal Corp Localization procedure for mobile networks
FI113730B (en) 2001-10-08 2004-05-31 Locus Portal Corp Location method for cellular networks
DE10157941A1 (en) * 2001-11-27 2003-06-05 Alcatel Sa Method for determining the position of a mobile station on the basis of propagation models
JP3792154B2 (en) 2001-12-26 2006-07-05 インターナショナル・ビジネス・マシーンズ・コーポレーション Network security system, computer apparatus, access point recognition processing method, access point check method, program, and storage medium
US6845241B2 (en) 2002-01-07 2005-01-18 International Business Machines Corporation Relevance assessment for location information received from multiple sources
CA2414789A1 (en) 2002-01-09 2003-07-09 Peel Wireless Inc. Wireless networks security system
US6788658B1 (en) 2002-01-11 2004-09-07 Airflow Networks Wireless communication system architecture having split MAC layer
US7058668B2 (en) 2002-01-11 2006-06-06 International Business Machines Corporation System for estimating the temporal validity of location reports through pattern analysis
US6760318B1 (en) 2002-01-11 2004-07-06 Airflow Networks Receiver diversity in a communication system
US6754488B1 (en) 2002-03-01 2004-06-22 Networks Associates Technologies, Inc. System and method for detecting and locating access points in a wireless network
US7028097B2 (en) 2002-03-28 2006-04-11 Intel Corporation Wireless LAN with dynamic channel access management
US6664925B1 (en) 2002-05-02 2003-12-16 Microsoft Corporation Method and system for determining the location of a mobile computer
FI113092B (en) 2002-05-31 2004-02-27 Ekahau Oy Measures of position differences and applications
FI113409B (en) 2002-05-31 2004-04-15 Ekahau Oy Sequence-based positioning technology
FI113410B (en) 2002-05-31 2004-04-15 Ekahau Oy Probalistic model for positioning technique
US7308276B2 (en) 2002-06-04 2007-12-11 Symbol Technologies, Inc. Method for locating mobile units based on received signal strength ratio
JP4334844B2 (en) * 2002-06-26 2009-09-30 東京エレクトロン株式会社 Manufacturing method of groove structure for device
US7509096B2 (en) 2002-07-26 2009-03-24 Broadcom Corporation Wireless access point setup and management within wireless local area network
US6993318B2 (en) 2002-08-05 2006-01-31 Technocom Corporation System and method for network assisted calibration in a wireless network
US7257105B2 (en) 2002-10-03 2007-08-14 Cisco Technology, Inc. L2 method for a wireless station to locate and associate with a wireless network in communication with a Mobile IP agent
GB0227634D0 (en) * 2002-11-27 2003-01-08 Koninkl Philips Electronics Nv Ranging and positioning method and apparatus
US6823190B2 (en) 2002-12-03 2004-11-23 International Business Machines Corporation System and method to anonymously test for proximity of mobile users without revealing individual phase space coordinates
US7392247B2 (en) 2002-12-06 2008-06-24 International Business Machines Corporation Method and apparatus for fusing context data
US20040203910A1 (en) 2002-12-31 2004-10-14 International Business Machines Corporation Spatial boundary admission control for wireless networks
US7295119B2 (en) 2003-01-22 2007-11-13 Wireless Valley Communications, Inc. System and method for indicating the presence or physical location of persons or devices in a site specific representation of a physical environment
US20040151377A1 (en) 2003-02-04 2004-08-05 Boose Molly L. Apparatus and methods for converting network drawings from raster format to vector format
FI20030222A (en) 2003-02-13 2004-08-14 Ekahau Oy Positioning applications for wireless networks
BRPI0407797A (en) 2003-02-25 2006-02-14 Boston Communications Group Inc method and system for controlling the use of a wireless device, method for controlling communications between a wireless communication device and another communication device, apparatus for controlling the use of a wireless device, and method for communicating usage information of a wireless device
US7853250B2 (en) 2003-04-03 2010-12-14 Network Security Technologies, Inc. Wireless intrusion detection system and method
US20040259554A1 (en) 2003-04-23 2004-12-23 Rappaport Theodore S. System and method for ray tracing using reception surfaces
US20040259555A1 (en) 2003-04-23 2004-12-23 Rappaport Theodore S. System and method for predicting network performance and position location using multiple table lookups
US7069024B2 (en) 2003-10-31 2006-06-27 Symbol Technologies, Inc. System and method for determining location of rogue wireless access point
US7127258B2 (en) 2003-11-10 2006-10-24 Symbol Technologies, Inc. WLAN roaming based on location
US7236128B2 (en) * 2004-06-23 2007-06-26 Cognio, Inc. System and method for locating radio emitters using self-calibrated path loss computation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5570412A (en) * 1994-09-28 1996-10-29 U.S. West Technologies, Inc. System and method for updating a location databank
US5717406A (en) * 1995-06-07 1998-02-10 Sanconix Inc. Enhanced position calculation
US6799047B1 (en) * 1999-02-25 2004-09-28 Microsoft Corporation Locating and tracking a user in a wireless network through environmentally profiled data
US6674403B2 (en) * 2001-09-05 2004-01-06 Newbury Networks, Inc. Position detection and location tracking in a wireless network
US6990428B1 (en) * 2003-07-28 2006-01-24 Cisco Technology, Inc. Radiolocation using path loss data

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CA2558442A1 (en) 2005-10-06
EP1733247A4 (en) 2010-05-05
WO2005091905A2 (en) 2005-10-06
EP1733247A2 (en) 2006-12-20
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